father John Newton Threlfall born about 1888 in Massachusetts of a Mass-born father and England-born mother
mother Margaret Brooks born about 1890 in Massachusetts of a Mass-born father and Maine-born mother.
1942: graduated from Purdue University in mechanical engineering
1943: enlisted in US Navy, serving through 1947; lieutenant
Joined NEHGS in 1963; later served as Trustee; frequent contributor to the Register; wrote twelve books.
Survived by Eila Maarit Hyyryläinen (wife of 68 years; they married June 26, 1949 in Madison, Wisconsin), four children; six grandchildren; six great-grandchildren. His brother Robert pre-deceased him.
↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:3QS7-89M1-QLNX?cc=2000219&wc=QZXY-RQB%3A790102901%2C798664201%2C800473701%2C953123901 : accessed 24 November 2017), Massachusetts > Norfolk > Weymouth Town > 11-298 Weymouth Town bounded by (N) Commercial, Church; (E) North, Commercial, Middle; (S) Broad; (W) Essex; also East Weymouth-Lovells Corner-Weymouth (part) > image 1 of 18; citing Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012.
"John Brooks Threlfall, 1920-2017," in American Ancestors, Fall 2017, p 21
"Threlfall, John Brooks," in Madison.com, 7 June 2017; link
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